Attachment for grindstones.



J. SYLVESTRE.

ATTACHMENT FOR GRINDSTONES. APPLICATION IfLED SEPT.21,1908.

925,610. Patented June 22,1909.

3 slams-3mm 1.

Z MMQI; I

Attorneys J. SYLVESTRE. ATTACHMENT FOR GRINDSTONES.

APPLIOATION FILED SEPT. 21,1908.

Patented June 22, 1909.

M M entor,

Witnesses Atto r neys JOSEPH SYLVESTRE, OF WHITE SULPHUR SPRINGS,MONTANA.

ATTAOHMEN T FOR GRINDSTONES.

Specification of Letters Patent.

Patented June 22, 1909.

Application filed September 21, 1908. Serial No. 453,986.

To all whom it may concern:

Be it known that I, JOSEPH SYLvEsTRE, a citizen of the United States,residing at White Sulphur Springs, in the county of Meagher, State ofMontana, United States of America, have invented certain new and usefulImprovements in Attachments for Grindstones; and I do hereby declarethat the following is a full, clear, and exactdescription of theinvention, such as will enable others skilled in the art to which itappertains to make and use the same.

The invention to be hereinafter described relates to supports to be usedin connection with emery wheels, grindstones or the like for holdingblades or tools to be sharpened.

The main objects of the invention are to provide a tool support whichmay be readily attached or detached and which will have all desirableadjustments.

Broadly speaking, it comprises a block provided with a clamping deviceby which it may be secured in place, a yoke hinged to the block, a barrevolubly mounted in the yoke, a frame adjustably mounted on the bar,and a table slidably mounted on the frame.

In order to more clearly disclose the con struction, operation and useof the invention, reference should be had to the accompanying drawingsforming part of the present application.

Throughout the several views of the drawings like reference charactersdesignate the same parts.

In the drawings: Figure 1 is a side elevation of the device, as applied;Fig. 2 is a right hand view of Fig. 1; and Fig. 3 is a plan view of Fig.1.

A base block 1 of suitable form and material is provided. To this blockis hinged, or otherwise similarly connected at 2, the yoke 3 in which isrevolubly mounted a bar or rod 4. The bar 4: is provided with atransverse opening adapted to revolubly receive a pin 5 which is rigidlysecured to a frame 6 having dove-tailed arms 7 adapted to fit slidablyinto cooperating mortises on or in the lower face of a table 8 on whichthe tool is to be supported. When the bar 1 has been revolved to givethe table 8 the desired inclination it may be locked in this position bymeans of the set screw 9 which takes through the arm of the yoke 3 andinto the bar at. The yoke 3 and block 1 mav be similarly locked inoperative position by means of a second set screw 10.

Through the construction above disclosed three separate and distinctadjustments of the table 8 may be effected :1st. the table may be slidbodily along the arms 7 of the frame 6 toward the emery wheel; 2nd. theframe 6 and its table 8 may be inclined by revolving the shaft 1; and,3rd. the table may be swung at an angle to the yoke 3 by means of thepin 5.

Should it be desired to render the device temporarily inoperative it issimply necessary to loosen set screw 10 and swing the yoke 3 back on itspivot to inoperative position. The blade or tool to be sharpened may belocked or fastened to the table by any desired means.

In order to clamp the device to the support of the emery wheel athreaded rod 11 and cooperating clamping jaw 12 have been provided. Therod has one end revolubly seated in the block 1. Thus, as the rod isrotated the block will be fed in one direction or the other thereon.When moving in one direction it will cooperate with the block 1 to clamptherebetween the support of the emery wheel. When moving in the otherdirection the reverse will, of course, be true.

It is thought that the operation and application of the device will beclear from the preceding detailed description.

Many changes may be made in the construction, arrangement anddisposition of the details of the several parts and many substitutionsfor these parts may be resorted to without in any way departing from thefield and scope of the present invention.

Having thus fully described my invention, what I claim as new, anddesire to secure by Letters Patent, is

1. A device of the character described, comprising a base block, a yokehinged thereto, a rod adjustably mounted in the arms of said yoke andextending substantially at right angles thereto and provided with anopening, a frame provided with a pin adapted to fit into said opening,and a table carried by said frame.

'2. A device of the character described, comprising a base block, a yokeconnected thereto, a rod mounted in the arms of said yoke to have bothrotary and longitudinal adjustment relatively to said yoke, a framepivotally supported by said rod and adapted to oscillate in a horizontalplane above said rod and to turn in a vertical plane with said rod, anda table carried by said frame.

3. A device of the character described, comprising a base block, a yokeconnected thereto, a rod mounted in the arms of said yoke to have bothrotary and longitudinal adjustment relatively to said yoke, a framepivotally supported by said rod and adapted to oscillate in a horizontalplane above said rod and to turn in a vertical plane with said rod, anda table slidably mounted on said frame.

4. A device of the character described, comprising a base block, a yokeconnected thereto, a rod mounted in the arms of said yoke to have bothrotary and longitudinal. adjustment relatively to said yoke, a framepivotally supported by said rod and adapted to oscillate in a horizontalplane above said rod and to turn in a vertical plane with said rod, anda table slidably mounted on said frame. 7

In witness whereof I have hereunto set lVitnesses:

W. J. CORKILL, WM. OUELLETT.

